Getting it into your agent
One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.
npx agentmods add skills/zjyao36/markdown-claude-code/writing-ccnpx skills add zjYao36/markdown-claude-code --skill writing-ccgit clone --depth 1 https://github.com/zjYao36/markdown-claude-codeWrote this? Show the measurements
A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.
[](https://agentmods.dev/skills/zjyao36/markdown-claude-code/writing-cc)<a href="https://agentmods.dev/skills/zjyao36/markdown-claude-code/writing-cc"><img src="https://agentmods.dev/badge/skills/zjyao36/markdown-claude-code/writing-cc.svg" alt="Measured on agentmods" height="20"></a>What it costs to keep this loaded
Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5.1 | $0.00110 | $0.04410 |
| Opus 5 | $0.00055 | $0.02205 |
| Sonnet 5 | $0.00022 | $0.00882 |
| Haiku 4.5 | $0.00011 | $0.00441 |
Grade A, and why
writing-cc scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 5d ago.
A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.
Nothing flagged
None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.
How it starts
The opening of the file, as written. The whole thing — 517 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Writing-CC: Automated Document Writing with Iterative Review
Write and refine: $ARGUMENTS
Overview
Use this skill when the user wants a polished, well-researched written document on any topic. The skill does not simply write and hand off. It first understands what makes the document valuable, derives measurable evaluation criteria, writes a grounded first draft, then runs it through an external GPT reviewer using those exact criteria — iterating until the document meets the bar or MAX_ROUNDS is reached.
Three principles dominate:
- Requirements first, writing second. Extract what the user actually needs before producing a single word of content.
- Criteria-driven quality. Every evaluation round uses the same rubric derived from the user's requirements — not generic writing advice.
- Grounded writing. All claims and examples must come from real sources: web search, local materials, or cited papers. Never fabricate examples.
User input (document request)
-> Phase 0 (Claude): Analyze requirements — purpose, audience, key points, constraints
-> Phase 1 (Claude): Derive evaluation rubric (5-7 measurable criteria) from requirements
-> Phase 2 (Claude): Research (web search + local materials) + write first draft
-> Phase 3 (Codex/GPT): Score draft on rubric, provide structured feedback
-> Phase 4 (Claude): Parse feedback, revise document
-> Phase 5 (Codex, same thread): Re-score revised document
-> Repeat Phase 4-5 until OVERALL SCORE >= SCORE_THRESHOLD or MAX_ROUNDS reached
-> Phase 6: Save full history to writing-logs/
Constants
- REVIEWER_MODEL =
gpt-5.4— Reviewer model used via Codex MCP. - MAX_ROUNDS = 5 — Maximum review-revise cycles.
- SCORE_THRESHOLD = 8.5 — Minimum overall score to stop early.
- OUTPUT_DIR =
writing-logs/— Directory for all output files. - MAX_SEARCH_QUERIES = 10 — Maximum web search queries during research.
- MAX_LOCAL_FILES = 10 — Maximum local files to scan for grounding.
What ships with it
1 file beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.
What this file has done since we first saw it
Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.
- 5d ago First seen · 517 lines · 110 tokens per session scan A 830546e5ca94
writing-cc is a skill published in the GitHub repository zjYao36/markdown-claude-code (5 stars, last pushed 5mo ago), licensed MIT. It adds 110 tokens to every session and 4,410 once invoked, about $0.0006 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.
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